OVA Kegareboshi / Defiled Stars

Kegareboshi no Kakera-tachi - hentai adapted from the manga of the same name by Satou Kuuki. 

OVA1:

Iori and Kokoha strive to become top idols as part of the newcomer duo "StellaResta". They and the other girls were joyfully celebrating the success of their first live performance with their manager Wataru, but...

Learning about Kokoha's scandal with Matsunami, Iori furiously bursts into the office of a weekly magazine, where she is offered a drink laced with drugs...

The demonic hands of producer Kurotsuki, who set a trap for her, plunge Iori into a whirlwind of orgasms...!

OVA2:

Kokoha strives to become the best in the newcomer duo "StellaResta". After she started a romance with her manager Wataru at the workplace, she was photographed, and Kurotsuka uses this photo as a means of blackmail to gradually turn her into his slut...

Kurotsuki brings Kokoha to orgasm many times before breaking her mind...

 

Episodes 3-4 added with Russian subtitles